<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>失败</title>
</head>
<body>
    <center>
        <h1>用户已存在请<a href="/reg.html">重新注册</a></h1>
    </center>    
</body>
</html>